The trike thing is based off an import bike that various distributors could get in the '70's and sell as their own. you location could be an inditication of who actually sold it, looks of it that's not really a big deal.
here in the US Terra-products Inc. would be the pretty popular version, from them it was called a TM-951, in parts of Canada you would see it badged as a Pony, they used 333 as the designation for it. And no, it would not have a trike option, that looks like the back of a kart grafted on, gonna need one heck of a jackshaft to get to that sprocket!
No idea on the blue thing, Bends dont look very precise, like maybe a home built or something possibly. the swingarm almost look like a modified bicycle crank???